Keypad with LPC_176x

[paukstelis]

I'm exploring the idea of using a keypad with LPC_176x (BTT SKR Turbo 1.4). Do I need to explicitly initialize TX0/RX0 (TFT connection) in order for it to accept the key commands?

[paukstelis]

Looking through how it is implemented in the other drivers, I guess this was just never implemented for LPC176X? :(

[terjeio]

Looking through how it is implemented in the other drivers, I guess this was just never implemented for LPC176X?

Correct.

Add the keypad plugin to the build and change the init function to open the port and register it:

bool keypad_init (void)
{
    if((nvs_address = nvs_alloc(sizeof(jog_settings_t)))) {

        hal.driver_cap.mpg_mode = stream_mpg_register(stream_open_instance(MPG_STREAM, 115200, NULL, NULL), false, stream_mpg_check_enable);

        ...

and add

#define KEYPAD_ENABLE 2

and you should have keypad & MPG mode active, mode switching by the 0x8B real time command character.

I'll add full MPG & keypad support later.

[paukstelis]

Thanks for that! It did make some progress. It does now recognize the 0x8B sent by a button push (at least, status report now has MPG: 1 and some other information in it immediately after pressing). I can't seem to get the axes to jog just yet.

[terjeio]

Single character jog commands are only available when MPG mode is off (MPG:0), when on you are in full control and have to send normal jog commands.

[paukstelis]

Still no joy there. I am sending 0x85 when jog buttons are released, followed by status report (?). I see that status report coming through the USB sender when the button is released, so it seems that is working. Just no movement in either MPG state. Edit: Also, if I send a jog command via USB and then hit a button it does cancel the jog as expected.

[paukstelis]

In my uninformed testing, it seems like all the real-time commands work, but grbl.enqueue_gcode doesn't seem to do anything. My testing is very naive, but I still don't get any jogging if I isolate the gcode command (to rule out the command building process) and try to get it to be enqueued:

            case 'H':                                   // Home axes
                //strcpy(command, "$H");
                strcpy(command, "$J=G91 G21 X-500 F100");
                jogging = grbl.enqueue_gcode((char *)command);
                break;

(I've changed remote button to send H in this case) I tried a non-jog commands as well (G92 X), and that also doesn't seem to get enqueued.

[terjeio]

I have just committed the needed changes to the LPC176x driver for proper keypad support.

[paukstelis]

Tested it out and it works great. Thank you!